MQ Resin: Methyl/Phenyl & Mw Okukosa PSA Okunyweza

Jiangsu Aokai New Materials , omukulembeze mu kukola PTFE obutambi obw’ebbugumu eringi, ekuweereza okwekenneenya okw’ekikugu okw’ekikugu.

The polarity, steric hindrance of organic groups and aggregation structure of molecular chains in MQ silicone resin ze nsonga enkulu okulungamya bbalansi y’emirimu gya silicone pressure-sensitive adhesives (PSA).Mu bufunze: okwongera ku phenyl content optimizes initial tack, okukwata amaanyi n’amaanyi g’okusekula omulundi gumu; ate nga obuzito bwa molekyu n’okugabanya obuzito bwa molekyu bigoberera etteeka erya bulijjo erya seesaw — obuzito bwa molekyu obusingako bulongoosa amaanyi g’okukwata naye nga ssaddaaka tack esooka; okugabanya obuzito bwa molekyu obugazi ngeri nnungi ey’okutebenkeza eby’obugagga ebikulu ebisatu eby’okusiiga.

1. Methyl / Phenyl Ratio: Ennongoosereza mu nkola ey’omunda nga tuyita mu nsengeka y’eddagala

Okukyusa ekitundu ky’ebibinja bya methyl (-CH3) n’ebibinja bya phenyl (-C6H5) nkola nnungi ey’okukyusakyusa ku ddaala lya molekyu:

·  Enhanced intermolecular force : Empeta ya benzene efulumya enkolagana ey’amaanyi eya π-π intermolecular interaction, n’esitula nnyo amasoboza ag’okukwatagana ag’ekisiiga, ekitereeza mu musingi amaanyi g’okukwata n’amaanyi g’okusekula.

·  Okwongera ku bugumu bw’olujegere lwa molekyu : Ebibinja bya phenyl birina ekiziyiza ekinene ekya steric, ekiziyiza okukyukakyuka kw’enjegere enkulu eza silikoni n’okukendeeza ku kukyukakyuka kw’enjegere. Kino kiganyula okukwata obuyinza naye kitera okunafuya initial tack.

·  Okulongoosa okufukirira : Okukyusa phenyl kwongera ku affinity ya silicone PSA ku substrate surfaces, okutumbula interfacial bonding, era okulongoosa byombi initial tack ne peel amaanyi.

2. Obuzito bwa molekyu & Engabanya: Okulungamya enkola okuyita mu Physical Entanglement & Aggregation State

Ebibinja ebikola bye bifuga okulungamya kwa kemiko , ate obuzito bwa molekyu n’okusaasaanya obuzito bwa molekyu (Polydispersity Index, PDI) bye bifuga okulungamya kw’ebintu :

Obuzito bwa molekyu (Mw) .

Amaanyi g’okukwatagana okusinga gava mu kuzinga mu mubiri (physical entanglement) kw’enjegere za polimeeri.

·  Mw eya waggulu ekola omukutu gw’okukwatagana omunene era gulongoosa nnyo amaanyi g’okukwata.

·  Mw esukkiridde efuula enjegere za molekyu okubeera enkalu ate nga tezikyukakyuka, ekivaamu okukendeeza ku maanyi ga tack n’okusekula mu kusooka.

Engabanya y’obuzito bwa molekyu (MWD) .

·  Engabanya enfunda : Omulimu ogw’enjawulo, okulongoosa okugendereddwamu okwangu ku kintu kimu nga high initial tack.

·  Engabanya mu bugazi : Okukwatagana kw’emirimu okujjuliza. Obutundutundu obw’obuzito bwa molekyu obw’amaanyi bukola amagumba g’omukutu ogukaluba okukakasa amaanyi ag’okukwatagana n’amaanyi g’okukwata; obutundutundu obw’obuzito bwa molekyu obutono bukola ng’ebizigo eby’omunda n’ebyanguyiza okufukirira, okulongoosa entambula y’enjegere n’okufukirira okw’amangu kungulu okukakasa nti tack ennungi esooka, okutuuka ku mutindo okutwalira awamu ogw’enjawulo.

3. Okulongoosa okukwatagana kw’omugerageranyo gwa M/Q, Dosage ya Resin n’obuzito bwa Silicone Rubber

Omugerageranyo gwa Methyl/phenyl n’obuzito bwa molekyu bye bisalawo eby’obugagga eby’obuzaale ebya MQ resin; ate nga M/Q ratio, resin to silicone rubber ratio ne silicone rubber viscosity bye bipimo ebitereeza obutereevu mu yinginiya wa formula, ebirina okukwatagana mu ngeri ey’okukwatagana.

Omugerageranyo gwa M/Q

Omugerageranyo gwa M/Q gusalawo butereevu obuzito bwa molekyu, ebirimu hydroxyl n’okukwatagana ne silicone rubber.The optimal M/Q molar ratio for silicone PSA okutwalira awamu 0.6 ~ 1.2 .Okugeza, medical-grade PSA adopts an optimal M/Q value of about 0.78; resin ne M/Q 0.6–0.9 nga egattibwa ne silicone rubber (viscosity 100×10−4 m²/s) ku mass ratio ya 2:3 efuna omulimu omulungi ennyo ogw’okusiiga ogujjuvu.

Omugerageranyo gw’okutabula kapiira ka Resin / Silicone

Omugerageranyo guno gwe kisumuluzo lever okutebenkeza eby’obugagga ebisatu ebikulu (initial tack, holding power, peel strength).

·  Ebirimu resin ebingi bitereeza okukwatagana, okukwata amaanyi n’amaanyi g’okusekula naye kikendeeza ku tack esooka.

·  Ebipiira ebingi biraga omuze ogw’ekikontana n’ekyo.

Okugeza, okulinnyisa omugerageranyo gw’obuzito bwa MQ resin okutuuka ku 107 silicone rubber okuva ku 1.2 okutuuka ku 2.5 kijja kwongera ku maanyi g’okukwata n’amaanyi g’okusekula 180° ate nga kikendeeza ku kusooka tack.Mu nkola ezikola, omugerageranyo gw’obuzito bwa silicone resin ku silicone rubber gutera okuba 45:55 ~ 75:25.

Obuzito bwa Silicone Rubber

Obuzito bwa molekyu obulaga obuzito bwe busalawo eby’obugagga ebikulu eby’enkola y’okusiiga era byetaaga okukwatagana obulungi ne MQ resin.Low-viscosity silicone rubber erina okukwatagana okulungi ne MQ resin, ekirungi eri amaanyi ga tack n’okusekula okusooka, naye eyinza okukosa amaanyi g’okukwata.

4. Enkola y’okukola ensengekera y’emirimu (Formula Design Principle) ku bbalansi y’emirimu

Mu silicone PSA formulation design, indexes enkulu essatu — initial tack, holding power, 180° peel strength  — zisobola okulung’amibwa obulungi n’engeri bbiri enkulu:

·  Phenyl modification — multiplicative optimization : Okunywa phenyl okutuufu kulongoosa eby’obugagga byonna ebisatu omulundi gumu, okumenya okuziyiza okw’ennono okwa seesaw.

·  Molecular weight & distribution adjustment — additive trade-off : Okufuga okutuufu okw’obuzito bwa molekyu n’okugabanya kutegeera bbalansi erongooseddwa wakati wa tack esooka n’amaanyi g’okukwata ku mbeera ez’enjawulo ez’okukozesa.

Mu kukola amakolero, enkola eya bulijjo ey’ensengekera ye molekyu obuzito obugazi okusaasaanya base resin nga kwogasse n’okukyusa phenyl okw’ekigero  okutebenkeza processability n’okukwatagana okujjuvu performance.For ultra-high temperature resistance ne hard chemical environments, high-phenyl-content MQ resin is the preferred solution.

Ebintu eby’ekikugu waggulu biweereddwa Jiangsu Aokai New Materials Technology Co., Ltd.

Bw’oba oyagala okumanya parameters enzijuvu, embeera z’okukozesa n’okugonjoola ebigonjoolwa ku layini yaffe ey’ebintu ebijjuvu: PTFE olugoye olw’ebbugumu eringi, PTFE olutambi olw’ebbugumu eringi, PTFE omusipi ogw’ebbugumu ery’amaanyi, omusipi gw’ekyuma ekifuyira ekitaliiko musango, olugoye lwa PTFE olw’oludda olumu, omusipi ogutambuza ogugumira ebbugumu eringi n’olugoye lwa fiberglass olugumira ebbugumu eringi, tukusaba otuukirire:

·  Mwami Guo: +86 18944819998

·  Mwami Liu: +86 13705266308 ku ssimu

Bulijjo tunywerera ku ndowooza y’obukugu n’obwesimbu, era tukuwa eby’okugonjoola eby’amakolero mu kifo kimu n’obuweereza obulowoozebwako.